Review on 💨 CO-Z True HEPA Air Purifier 540sqft: Top-rated 6-in-1 Air Cleaner for Smoke, Dust, Pet Dander - Large Room Air Purifier with HEPA Filter, Ionizer, Remote Control by Maribel Gilbe

I have designed and built air purification systems for residential and commercial applications. I once had an underground warehouse where cleaning and air quality were important (in a cave 13 stories underground). So I had to learn all about this stuff. This brand should be paying me to look at this, but I'm writing this for Revain customers so you know what to look for and don't get scammed when buying an air purifier. After taking it apart and looking at all the components, here's what I think: - This is far from the worst air purifier I've taken apart. They don't charge much for it (less than $100), and at least it has *most* of the components they claim. I've looked at air purifiers that charge 4 or 5x their retail price, are of lower quality, and/or openly lie about what components are included. This seems to be an area where consumers don't know what to look for and some units won't disassemble or require 1,000 small screws to be undone to disassemble, so it's hard to say for sure . OVERALL BUILD QUALITY ===== Pretty bad. Thin thin plastic on the outside, easy to crack. There is no door for the filter, you just need to tear off the outer cover. Just pull hard. I hope people know how to open it up and remove the plastic wrap from the filter before turning it on! CONTROL PANEL AND REMOTE CONTROL ===== The remote control does not work from a distance or at an angle. You must point directly at it and sit/stand over the device. Not impressed. The control panel is a bit confusing and the instructions are very sparse. AIR QUALITY MONITOR ===== It says it has a TVOC sensor but it doesn't! It has a PM2.5 sensor and that's a big difference. PM2.5 is basically a dust sensor and it works, it's pretty accurate, it just tells you how many particles are flying in the air. So it's a nice addition to any air purifier, but it's probably better to have a separate TVOC or TVOC+ air quality monitor around the house. TVOC controls important volatile organic compounds (volatile organic compounds, mainly outgassing from plastics, latex paint). , vinyl, glue, etc.). In many homes, VOC tests are off the charts and this causes more indoor pollution than outdoor pollution and even causes health problems. But a good air quality monitor is fairly inexpensive and should also monitor formaldehyde (HCHO), CO, CO2, and maybe even other things none of which show up on cheap PM2.5 sensors. It's not a very complete picture, so I can't get excited about it. FILTER=====Good: Yes it's a 4 stage filter but it's pretty average, the same one I use in my oven. It's actually the right size for this device (8.5 x 13 inches), which is why many brands save money and put a cheap tiny filter in their giant air purifier. It also fits perfectly - no air can escape through the filter. A lot of other brands vent air all over the unit and blow dust around the room, so I get a few points for that. .Coming from China, I don't know what they spray on their filter material, maybe teflon or other chemicals here.On first use the tab came loose indicating poor quality.I tied a zip tie from the power cord to the filter so I could could pull it out when it's time to replace it. Also, there are currently no replacement filters from this brand. If you are only looking for sizes, you should search something. But here's a tip for those or any other air purifier - just get a good oven filter and reduce its size. uh easy. If you don't have a border, just wrap the edges with tape. IONIZER ===== The anion generator is the key to dust control in your home and most air purifiers don't even have one, or lie about it and say they have one. Also, many brands contain ozone and call it an anion, which can actually be dangerous. FYI, ozone is great for sterilizing and removing odors, but it's useless on dust and you should never be in the same room as an ozone machine. It works by converting O2 into O3, which can burn your lungs. There is indeed an ionizer, but it is so sophisticated that it does almost nothing. A good ionizer (like an EdenPure machine) will make your entire home smell like fresh ions, about 1000 to 2000 square feet. Is it maybe enough? 50-80? square foot. You have to be near the car to smell it. I took a picture, it's about the size of a pencil point, and the device only needs a few watts of power, expecting it to work too much is ridiculous. This is a UV sanitizer that is directly a scam. It has a. but it scares me so i removed it. so many problems It's called a germicidal lamp, and yes, it kills germs when used properly. But there's so much going in - there have to be multiple bulbs, the air has to get very close to the bulb (within a few inches), and for a specific amount of time (a few seconds). The lamp should be wide enough, tall enough, bright enough. This lamp doesn't do any of that. Even if that bulb actually works, look at my airflow diagram - only about 5% of the air intake ever touches the bulb. But the problem isn't that it's inefficient - it's a mercury lamp and that makes me nervous. If this thing breaks, mercury fumes will fly all over our living room. No, I don `t want that. And while this is a true germicidal lamp, it's the lowest quality I've seen. First, it is glued to double-sided tape, not even screwed. If this thing falls, it may crack, heat up, melt, etc. Also, tt has bubbles in the glass, dirt inside, the filament flickers and looks like it's going to literally burst at any moment. I'm overcautious about things like this, but I assume by purchasing air purifiers you're trying to limit or reduce the amount of pollution and pollutants in your living space, right? So I pulled the bulb out and took it to the local hardware store for recycling. I don't trust it and don't want it in my house.AIRFLOW AND DESIGN=====This is actually a big problem - the air intake is through the sides, which is similar to the air purifier handles. It's a terrible design because the fan and filter can handle a small amount of airflow, but those little vents on the side are the bottleneck. Air purifiers are priced based on how often they recycle the volume of air in a room, and given that bottleneck, I think it's limited to an 80- to 100-square-foot space. In addition, the air is sucked in from the sides, and all the dust accumulates there. Conclusion - you better take a box fan and tape an oven filter in front of it and then put an EdenPure or something else ionizer on it. Those two things would be 1000% more efficient than that.